当时间不在轴上时会出现并行周期问题

Question

此查询中计算出的成员[金额LM]（=上个月的金额）有什么问题？如果我在行上指定时间似乎有效，但是即使我在where子句中有日期，我也不能指定时间。

WITH

MEMBER [Amount LM] as
    (
        [Measures].[Amount],

        ParallelPeriod (
            [Date].[Year - Quarter - Month - Date - Hierarchy].[Year and Month],
            1,
            [Date].[Year - Quarter - Month - Date - Hierarchy].CurrentMember
        )
    )


SELECT 
   {[Amount LM], [Measures].[Amount]} ON  COLUMNS,

[Measure Types].[Name].&[22] --not related to [Measures].[Amount]; Used as a measure switch in the real case but adjusted here for simplicity
-- comment out the next line to fail
* [Date].[Year - Quarter - Month - Date - Hierarchy].[Year and Month] 

ON rows


FROM [Cube]
WHERE [Date].[Year Number].&[2019]
;

工作案例的结果：

                           Amount LM  |  Amount
    Costs  |    Jan 2019  | (null)    |  109600
    Costs  |    Feb 2019  | 109600    |  218300.5
    Costs  |    Mar 2019  | 218300.5  |  392250
    Costs  |    Apr 2019  | 392250    |  206800
    Costs  |    May 2019  | 206800    |  174700
    Costs  |    Jun 2019  | 174700    |  298400
    Costs  |    Jul 2019  | 298400    |  264550
    Costs  |    Aug 2019  | 264550    |  424100
    Costs  |    Sep 2019  | 424100    |  129650
    Costs  |    Oct 2019  | 129650    |  330050
    Costs  |    Nov 2019  | 330050    |  (null)
    Costs  |    Dec 2019  | (null)    |  (null)

没有

* [Date].[Year - Quarter - Month - Date - Hierarchy].[Year and Month] 

部分，金额LM ist NULL

          |Amount LM| Amount
    Costs | (null)  | 2548400.5

Answer 1

您的计算没有问题。要了解为什么当您没有